For the past 14 seasons, we’ve watched them shake and sashay their sequins around the dance floor. Now, 13 past contestants—including six previous winners, two Olympic champions, two boy-banders, and a football legend—are back to compete once again for the mirror-ball trophy. Here are some of our favorites; who do you think will win Dancing with the Stars: All Stars (premiering Monday, September 24, at 8 p.m. ET)?

It’s a rite of passage: playing sports in high school. Even some of the biggest Hollywood celebs did it, back before they were stars—though some might prefer to forget the uniforms. Can you guess who these sporty stars are?